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Arisa [49]
3 years ago
5

You are a plumber, and you are repairing a toilet leak. The job should take 0.9 hours. About how many minutes will it

Mathematics
2 answers:
monitta3 years ago
6 0

Answer:

54

Step-by-step explanation:

multiply 60 by 0.9 and you get 54..?

anzhelika [568]3 years ago
3 0

Answer:

54

Step-by-step explanation:

0.1 is 10% of 1 and was subtracted off so we subtract 10% off 60 so 60 x 10% = 6

60 - 6 = 54

Hope this helps can I have brainliest

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Solve (x + 3)2 + (x + 3) – 2 = 0. Let u = Rewrite the equation in terms of u. (u2 + 3) + u – 2 = 0 u2 + u – 2 = 0 (u2 + 9) + u –
Verdich [7]

Answer:

The solutions of the original equation are x=-5 and x=-2

Step-by-step explanation:

we have

(x+3)^2+(x+3)-2=0

Let

u=(x+3)

Rewrite the equation

(u)^2+(u)-2=0

Complete  the square

u^2+u=2

u^2+u+1/4=2+1/4

u^2+u+1/4=9/4

rewrite as perfect squares

(u+1/2)^2=9/4

square root both sides

(u+1/2)=\pm\frac{3}{2}

u=(-1/2)\pm\frac{3}{2}

u=(-1/2)+\frac{3}{2}=1

u=(-1/2)-\frac{3}{2}=-2

the solutions are

u=-2,u=1

<em>Alternative Method</em>

The formula to solve a quadratic equation of the form

ax^{2} +bx+c=0

is equal to

x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}

in this problem we have

(u)^2+(u)-2=0

so

a=1\\b=1\\c=-2

substitute in the formula

u=\frac{-1\pm\sqrt{1^{2}-4(1)(-2)}} {2(1)}

u=\frac{-1\pm\sqrt{9}} {2}

u=\frac{-1\pm3} {2}

u=\frac{-1+3} {2}=1

u=\frac{-1-3} {2}=-2

the solutions are

u=-2,u=1

<em>Find the solutions of  the original equation</em>

For u=-2

-2=(x+3) ----> x=-2-3=-5

For u=1

1=(x+3) ----> x=1-3=-2

therefore

The solutions of the original equation are

x=-5 and x=-2

4 0
3 years ago
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Melody paid for a scarf with a ten dollar bill her change was two dollar three quarters and two dimes how much was the scarf
olya-2409 [2.1K]

Answer:

Step-by-step explanation:

10 -2.95 = 7.05

the scarf cost $ 7.05

7 0
2 years ago
Read 2 more answers
Can someone please answer this question please answer it correctly and please show work please help me I need it
Oksana_A [137]

Answer:

C

Step-by-step explanation:

Question: 10 - 8 = 2

A = (-18)

B = 18

C = 2

D = (-2)

6 0
3 years ago
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The area of a rectangle is 336 square inches. If the width of a rectangle is 6 inches. What is the length of the rectangle?
Hoochie [10]
The length of the rectangle is 56

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3 years ago
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An office supply company manufactures paper clips, and even tolerates a small proportion of those paper clips being ‘defective’
vovikov84 [41]

Answer:

0.104 (10.4%)

Step-by-step explanation:

UCL = \bar{p}+z(\sigma)

\sigma = p(1-)) Vn = 1.02(1-202)) 5 = 0.028

\thereforeUCL = .02+(3x0.028) = 0.104

\thereforeUCL= 10.4%

4 0
3 years ago
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